This is so right-on. The idea that marriage is about holiness more importantly than happiness is what I miss the most about being married. Seriously, if you want an amazing and lasting marriage, make it all about God. In my mind, THE book on that subject is "Sacred Marriage" by Gary Thomas. And it contains my favorite quote on marriage: "If you want to serve God, stay single. If you want to be like Christ, get married." I miss the chance of getting to be more like Christ very much, but He's been teaching me how to serve Him while I'm single again.